Coupling-hook lock



June 11, 1929. L. WALASKY ET AL COUPLING HOOK LOCK Filed March 19, 1928 2. Sheets-Sheet Inventors I/YaZas/(y & Paul Hrocka Attorney June 11, 1929. WALASKY ET AL 1,717,129

COUPLING HOOK LOCK Filed M arch 19,'192s 2 Sheets-Sheet 2 fn'venmrs L ewz's WaI/aslfy Paul Mrocka Attarngy Patented June 11, 1929.

LEWIS WALASKY AND PAUL MROCKA, OF MAYFIELD, PENNSYLVANIA.

COUPLING-HOOK LOCK.

Application led March 13, 1928. Serial No. 262,918.

This invention relates to new and useful improvements in mine car coupling hooks and aims to provide a locking device associated with the hook to prevent the same jumping 2', from the draw-head of the next adjacentmine car.

An important object of this invention resides in the provision of a coupling hook of this character that may be manufactured and i0 marketed at a cost but slightly greater than the usual hooks now in use the nature of the invention being such that the hook lock will by its own weight normally seek a locking position and that may be readily actuated to unlooking position so that the hook may he manually detached from the draw-head of the next adjacent mine car.

With the foregoing and other objects in view as the nature of the invention will be better understood, the same comprises the novel form, combination and arrangement of parts hereinafter more fully described. shown in the accompanying drawings and claimed.

In the drawings wherein like reference nu- 2 merals indicate corresponding parts through the several views Figure 1 is a fragmentary side elevation of the adjacent ends of a pair of mine cars showing my improved coupling hook in use,

Figure 2 is a side elevation partially in cross section of the hook per se,

Figure 3 is a top plan view thereof, Figure 4 is a transverse section taken suhstantially upon the line 44 of Figure 3,

Figure 5 is a perspective of the lock member per se, and

Figure 6 is a fragmentary horizontal section of the hook taken substantially on the line 6-6 of Figure 2. Now having particular reference to the drawings in Figure 1 there is disclosed fragmentarily a pair of adjacent mine cars designated generally A, A. The rear end of the foremost car is equipped with a length of chain B to the free end of which is attached my improved coupling hook designated generally by the reference character 5 the nose portion of which is adapted for engagement within the usual draw-head C upon the adj a- 0 cent end of the following car A. In carrying out the invention this hook 5 is formed directly back of the goose-neck end with a diagonal thickened portion 6 the opposite sides of which are formed with diagonally extending channels 77. Slidably arranged within these channels 7-7 are the elongated legs of an inverted U-shaped yoke 8 the bight. portion of which is equipped with a pivotal handle 9. The lower ends of the legs 8 of this yoke arc formed with forwardly extending inclined toes 1010 arranged through registering openings in which is a detachable pin 11.

The inner surface of the nose of the hook 5 in line with the forward edges of said channels 77 is formed with a notch 12 for receiving this pin 11 when the yoke drops downwardlyto the position disclosed in Figures 1, 2 and 4t which position the said yoke, being in back of the bight portion of the draw-head C will prevent the disengagement of the hook from said draw-head.

By reason of the channel 77 in opposite sidcs of the thickened portion of the hook 5 are formed ribs and the lower ends of the rihs forwardly of the channels terminate above the lower edge of the thickened portion and are beveled so as to accommodate the toes 1010 of the yoke legs while directly beneath the beveled ends of these ribs the shank of the hook is formed with a notch 13 for receiving the pin 11 when the yoke is raised which will permit the yoke to be raised so that the lower end thereof will have a flush engagement with the lower surface of the hook shank enabling the hook to be readily released from the draw-head C.

In View of the foregoing description when considered in conjunction with the accompanying drawings it will be apparent that we have provided a highly novel, simple and useful lock hook coupling that is well adapted for the purpose heretofore designated and even though we have herein shown and described the invention as consisting of certain detail structural elements, it is nevertheless to be understood that minor changes may be made therein without affecting the spirit and scope of the appended claims.

Having thus described our invention, what we claim is 1. A coupling hook for mine cars comprising a shank, a bill on said shank having a portion thereof substantially paralleling the shank, the opposite faces of such shank being increased in thickness and having inclined guide channels formed therein, the inner face of the bill of the hook adjacent to the free end thereof being provided with an inclined keeper notch, a yoke member having its legs slidably arranged within said guide channel, and a cross pin between the lower ends of the legs of the yoke for fitting in said keeper notch when the yoke is in its lowered position.

2. In a safety coupling hook for mine cars, a shank, a bill on said shank having a portion thereof substantially paralleling the shank, the shank having inclined guide channels formed in the opposits faces thereof and a notch in its inner face, the inner face of the bill of the hook, adjacent to its free end being provided with an inclined keeper notch in alignment with the first mentioned notch,

and a yoke member having its legs slidably arranged within said channels, angnlarly extending feet formed on the lower ends of said legs, and a cross pin carried by said feet for engagement with the keeper not-ch when the hook is in its lowered position and for engagement in said first mentioned notch when the yoke is in its raised position.

In testilnony whereof we afiix our signatures.

LEWIS WALASKY. PAUL MROGKA. 

